Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ead740616c680e6…

MALICIOUS

PDF

80.3 KB Created: 2021-09-15 17:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ba56af045ee2aed32d1d9502479ee618 SHA-1: ec8659fdda4faa692ea928e0e13d0afad49588fb SHA-256: 5ead740616c680e6d572d4dd91c42aa7a21bd75a1d1d99d139f51de0c0f61173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, such as drafthe.ru and sosnovgeo.ru. The presence of numerous external URIs and link farm indicators strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=atomic+radius+decrease PDF link annotation
    • http://sosnovgeo.ru/userfiles/file/60293943701.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16141a182690ea---rimowodaxepilotil.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411984f3e59---57078753634.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338451979eb---beruf.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/xaxisexuz.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/gakasapodimonokowof.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/voxosamobu.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/47208755567.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/jupisasaxurat.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8ddf75383---jebuforowifomijunuduzi.pdfIn PDF document text
    • https://terracell.info/images/file/61525727270.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/vunegawibitis.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/12228218234.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/tarajubisamuvufal.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130cbd71507b---sekutuzigegijimutavox.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/41426502483.pdfIn PDF document text
    • http://jarosi.hu/files/file/60196796322.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/tisejer.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5748492481338c6ad981f0a2c36be056/madavajovijo.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d44d449a6---77746231234.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/35271821002.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/44372570506.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/metatamiz.pdfIn PDF document text
    • http://mamitobe.ru/files/file/rilatutofulu.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/12764425085.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 17644 bytes
SHA-256: eb4be2a50a88d30f3d91841d6ee87f8ea5af3b6bdbdd516b683c60a1d6ea8aa4
font_02_sfnt_off00011bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD7 10464 bytes
SHA-256: e1febef94e669189aa14992353447da886ab2be94a8d0052d4849c6ead117c09

Open this report in the interactive analyzer, or submit your own file for analysis.